Model:GIPL: Difference between revisions
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|Country=US | |Country=US | ||
|Email address=eejafarov@alaska.edu | |Email address=eejafarov@alaska.edu | ||
}} {{Model identity | }} | ||
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|Model type=Single | |Model type=Single | ||
|Categories=Model domain, Terrestrial | |Categories=Model domain, Terrestrial | ||
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|One-line model description=-- | |One-line model description=-- | ||
|Extended model description=-- | |Extended model description=-- | ||
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{{Model technical information | |||
|Supported platforms=Unix, Linux, Windows | |Supported platforms=Unix, Linux, Windows | ||
|Programming language=Fortran90, Matlab | |Programming language=Fortran90, Matlab | ||
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|IRF interface=No not possible | |IRF interface=No not possible | ||
|Typical run time=it takes less than a minite to run the serial model for one with daily time interval | |Typical run time=it takes less than a minite to run the serial model for one with daily time interval | ||
}} {{Input - Output description | }} | ||
{{Input - Output description | |||
|Describe input parameters=Upper Boundary (Air temperature) | |Describe input parameters=Upper Boundary (Air temperature) | ||
Lower Boundary (Temperature gradient) | Lower Boundary (Temperature gradient) | ||
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|If above answer is yes=ESRI, Matlab | |If above answer is yes=ESRI, Matlab | ||
|Other visualization software=Matlab, Microsoft Excel (for serial); Matlab, ARCGIS, ncview (for spatial model) | |Other visualization software=Matlab, Microsoft Excel (for serial); Matlab, ARCGIS, ncview (for spatial model) | ||
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|Describe processes represented by the model=Main purpose of the model is to calculate subsurface temperature profile, active layer depth and freeze-up day. | |Describe processes represented by the model=Main purpose of the model is to calculate subsurface temperature profile, active layer depth and freeze-up day. | ||
|Describe key physical parameters and equations=Thermal capacities and conductivities prescribed for each subsurface layer, volumetric water content and unfrozen water coefficients. | |Describe key physical parameters and equations=Thermal capacities and conductivities prescribed for each subsurface layer, volumetric water content and unfrozen water coefficients. | ||
}} {{Model testing | }} | ||
{{Model testing | |||
|Describe available calibration data sets=We have tested the model for different permafrost observation sites for Alaska(USA) and Siberia(Russia). Typically, the model results show good correlation with measured data (if observations are accurate). | |Describe available calibration data sets=We have tested the model for different permafrost observation sites for Alaska(USA) and Siberia(Russia). Typically, the model results show good correlation with measured data (if observations are accurate). | ||
}} {{Users groups model}} {{Documentation model | |Model calibration data=Sample.zip, | ||
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|Manual model available=No | |Manual model available=No | ||
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== Introduction == | == Introduction == | ||
Revision as of 18:27, 19 May 2010
Contact
| Name | Elchin Jafarov |
| Type of contact | |
| Institute / Organization | Univ. of Alaska Fairbanks |
| Postal address 1 | |
| Postal address 2 | |
| Town / City | Fairbanks |
| Postal code | 99775 |
| State | Alaska |
| Country | US"US" is not in the list (Afghanistan, Albania, Algeria, Andorra, Angola, Antigua and Barbuda, Argentina, Armenia, Australia, Austria, ...) of allowed values for the "Country" property. |
| Email address | eejafarov@alaska.edu |
| Phone | |
| Fax |
GIPL
Metadata
Summary
Technical specs
In/Output
Process
Testing
Other
IntroductionGIPL(Geophysical Institute Permafrost Laboratory) is an implicit finite difference one-dimensional heat flow numerical model. The model was developed by V.Romanovsky and G. Tipenko at University of Alaska Fairbanks. The model uses coarse vertical resolution grid which preserves the latent-heat effects in the phase transition zone, even under conditions of rapid or abrupt changes in the temperature fields. The air temperature is a driving force for the GIPL upper boundary condition and constant geothermal heat flux at the lower boundary (typically from 500 to 1000 m). The other inputs are precipitation, prescribed water content and thermal properties of the multilayered soil column. As an output the model produces temperature distributions at different depths, active layer thickness and calculates time of freeze up. HistoryPapersIssuesHelpInput FilesThere are 6 input files. input.txt contains input parameters and input points. thermo.txt contains thermal and unfrozen water properties. grid.txt contains used for calculations grid. bound.txt includes upper boundary temperatures, which are usually air temperature. snow.txt and rsnow.txt contains snow depth and conductivity. Output FilesThe are two main output files. results.txt contains results which are depend on time step prescribed by user in input.txt file (usually timestep = 1 day). mean.txt contains results which are depend on mean time step, also assigned in input.txt DownloadSource |
